The challenge

Time period 9:00 9:30 10:00 10:30 11:00 11:30 12:00 12:30 13:00 13:30 14:00 14:30 15:00 15:30 16:00 16:30 17:00
Market price 80 85 90 100 90 90 60 50 40 40 40 45 50 45 40 40 120
Non-commodity cost 60 60 60 45 65 65 65 65 65 65 65 65 65 65 75 75 75

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